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joule (n.)

unit of electrical energy, 1882, coined in recognition of British physicist James P. Joule (1818-1889). The surname is a variant of Joel. Related: Joulemeter.

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Definitions of joule from WordNet
1
joule (n.)
a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second;
Synonyms: j / watt second
2
Joule (n.)
English physicist who established the mechanical theory of heat and discovered the first law of thermodynamics (1818-1889);
Synonyms: James Prescott Joule
From wordnet.princeton.edu